What is the constant in the mathematical expression? 3/4ab+7.51- ab2- 3/43- 3/4ab4- 7.5

Therefore, 7.5 is the constant in mathematical expression.

Step-by-step explanation:

Given the mathematical expression:

is cofficient of ab in this expression.

ab is variable( whose values can be changed).

7.5 is a constant term ( whose value can't be changed).

Therefore, 7.5 is the constant in mathematical expression.

option a, c,d are correct.

step-by-step explanation:

from the given figure, it is given that z is equidistant from the sides of the triangle rst, then from triangle tzb and triangle szb, we have

tz=sz(given)

bz=zb(common)

therefore, by rhs rule,δtzb ≅δszb

by cpctc, sz≅tz

also, from δctz and δasz,

tz=sz(given)

∠tcz=∠saz(90°)

by rhs rule, δctz ≅ δasz, therefore by cpctc, ∠ctz≅∠asz

also,from δasz and δzsb,

zs=sz(common)

∠zbs=∠saz=90°

by rhs rule, δasz ≅δzsb, therefore, by cpctc, ∠asz≅∠zsb

hence, option a, c,d are correct.

whatvare the choices

step-by-step explanation: